Carbon nanotube growth from solution processed cobalt catalyst

Ithnin, Nur Azura (2015) Carbon nanotube growth from solution processed cobalt catalyst. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The thesis discusses about the preparation step, parametric study and characterization of carbon nanotubes (CNTs) growth from solution process cobalt catalyst. The process involve in CNT growth start with catalyst preparation step that was by solution process and followed by actual growth of CNTs by using Alcohol Catalytic Chemical Vapor Deposition (ACCVD) method. Cobalt catalyst was selected for CNT growth and was deposited onto the substrate by spin coating method to create uniform thin film. After the substrate undergo heat treatment for catalyst particle formation, the elemental confirmation, morphology and shape of the catalyst nanoparticles were obtained using high resolution-scanning electron microscopy (HR-SEM). CNT was growth using ACCVD method with control of the CVD processing temperature in order to deduce the effect of CVD temperature on the as-grown CNTs. As-grown CNTs were analyse using Raman spectroscopy in order to detect the presence of CNT and make qualitative analysis on as-grown CNTs. It was found that solution processed is a good alternative to replace physical vapour deposition method in producing catalyst thin film for CNT growth where CNTs have been successfully grown with optimum growth temperature of 700 °C using ACCVD method with calculated IG/ID ratio of 6.46 indicates good crystalline quality of CNTs with highly ordered graphitic structures grown at this temperature with the highest percentage of CNTs about 83 % on the sample with dominant SWCNTs presence with diameter in the range of 0.907 to 0.914 nm.

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